It's quixotic, being a peace activist in Sderot, an Israeli town that has borne the brunt of rocket attacks from Gaza. When Israeli air strikes on Gaza began last month, hundreds of people from Sderot swarmed to a vantage point known as Horseman's Hill to watch the fiery spectacle and cheer. Nomika Zion was not among them. "I listened to one of my neighbors telling Israeli TV that the sound of the bombing was like a symphony, that he's never heard such powerful music before," she says. "And I was thinking, How many people are dying because...